TCRward personalized transplant therapies.

Area of Science:

• Immunology
• Nephrology
• Genomics

Background:

• Acute cellular rejection (ACR) is a major cause of kidney transplant failure.
• Understanding the T cell repertoire in ACR is crucial for developing targeted therapies.

Purpose of the Study:

• To characterize the T cell populations and clonality in kidney biopsies from patients with ACR using single-cell sequencing.
• To investigate the phenotypic diversity of T cells infiltrating the kidney during rejection.

Main Methods:

• Single-cell RNA sequencing (scRNA-seq) and T cell receptor sequencing (TCR-seq) were performed on kidney biopsy samples from ACR patients.
• Bioinformatic analyses were used to identify T cell subsets, assess clonality, and analyze gene expression profiles.

Main Results:

• Limited T cell clonality was observed in ACR kidney biopsies, indicating a polyclonal T cell response.
• A diverse range of T cell phenotypes, including effector and regulatory T cells, were identified.
• Specific T cell subsets were associated with the severity of rejection.

Conclusions:

• The T cell response in ACR is characterized by limited clonality but diverse phenotypes.
• These findings highlight the complexity of immune mechanisms in kidney allograft rejection.
• Further research into specific T cell subsets may lead to novel therapeutic strategies for preventing or treating ACR.